Cause I said so 
Because it’s necessary
I doubt EVE Portal is in any way necessary, as it will just end up as yet another abandonware with lackluster feature scope to begin with. Reading through the latest ESI dev blog, I get the feeling that third party apps will get a lot more powerful in the near future so that CCP can bank on other people picking up their slack.
Well as more focus in the future that leans towards mobile platform access to New Eden, could suggest that we would need to maintain the Eve Portal
/ie two years from now how would you like to access New Eden?
CCP doesent
CCP needs something fun to work on that will make them have fun
Can you think of something fun for CCP to do? (They believe pepople pay them to have fun or something)
We can do more with ESI and SDE, but its hard to be profitable (I mean isk), so player-developers are just developing with passion, which is unsustainable.